Note 3 at Acts 10:45: Some scholars speculate that this took place as many as ten years after the day of Pentecost. Peter, for sure, and possibly some of these other Jews, had been born again and walking with the Lord for a long time in such close relationship that his shadow had healed people (Acts 5:15) and others had been raised from the dead (Acts 9:41). Yet, they were totally surprised to see God's acceptance of the Gentiles which was clearly prophesied in Old Testament scriptures (Isa. 11:10; 42:6; 49:6, 22; 60:3-16; 62:2; 66:19; Jer. 16:19-21; Mal. 1:11), and which Jesus spoke of Himself (Mt. 8:11-12; 21:42-43; Jn. 10:16; Lk. 4:25-27; 13:29;).

This illustrates that the Lord doesn't bring us into all truth instantly, but there is a growth process (Isa. 28:10). Every believer has enough "blind spots" that we have no right to adopt a "know-it-all" attitude. "If any man thinketh that he knoweth any thing, he knoweth nothing yet as he ought to know" (1 Cor. 8:2).